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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '39564753daf71c9f99ead5f76084e7d9c216b71b87666959721220b323556531' 
  AND token = 'W9EbN7kAE5qm9ZsRdvjXpJya8qSz4NZzlH4CGxGAA0M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}